//模拟实现curry
// const _ = require('lodash')

function getSum (a,b,c) {
  return a + b +c
}

const curried = curry(getSum)

console.log(curried(1,2,3))

function curry (func) {
  return function curriedFn(...args) {
    //判断实参和形参的个数
    if (args.length < func.length){
      return function(){
        return curriedFn(...args.concat(Array.from(arguments)))
      }
    }
    return func(...args)
  }
}